We search for invisible decays of the Upsilon(1S) meson using a sample of 91.4x10(6) Upsilon(3S) mesons collected at the BABAR/PEP-II B factory. We select events containing the decay Upsilon(3S)->pi(+)pi(-)Upsilon(1S) and search for evidence of an undetectable Upsilon(1S) decay recoiling against the dipion system. We set an upper limit on the branching fraction B(Upsilon(1S)-> invisible)< 3.0x10(-4) at the 90% confidence level.
We search for invisible decays of the Upsilon(1S) meson using a sample of 91.4x10(6) Upsilon(3S) mesons collected at the BABAR/PEP-II B factory. We select events containing the decay Upsilon(3S)->pi(+)pi(-)Upsilon(1S) and search for evidence of an undetectable Upsilon(1S) decay recoiling against the dipion system. We set an upper limit on the branching fraction B(Upsilon(1S)-> invisible)< 3.0x10(-4) at the 90% confidence level.
Search for Invisible Decays of the Upsilon(1S)
Baracchini E;Ferroni F;
2009-01-01
Abstract
We search for invisible decays of the Upsilon(1S) meson using a sample of 91.4x10(6) Upsilon(3S) mesons collected at the BABAR/PEP-II B factory. We select events containing the decay Upsilon(3S)->pi(+)pi(-)Upsilon(1S) and search for evidence of an undetectable Upsilon(1S) decay recoiling against the dipion system. We set an upper limit on the branching fraction B(Upsilon(1S)-> invisible)< 3.0x10(-4) at the 90% confidence level.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
